*::after, *::before {
  box-sizing: border-box;
}

*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  display: flex;
  flex-flow: row wrap;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

h2 {
  font-size: 6em;
  text-align: center;
}

h2 span {
  position: relative;
  display: inline-block;
  color: #03a9fa;
}

h2 span:nth-child(odd) {
  color: #414141;
  line-height: 1em;
  overflow: hidden;
  letter-spacing: -1em;
  transition: .5s ease-in-out;
}

h2:hover span:nth-child(odd) {
  letter-spacing: 0;
}

h2 span:nth-child(2) {
  margin-right: 10px;
}

h2 span:nth-child(2)::after {
  content: '2';
  display: block;
  position: absolute;
  bottom: 0;
  right: -10px;
  font-size: .35em;
}

h2 i {
  position: absolute;
  transform: translateX(-50%);
  font-size: 18px;
  color: #777;
  font-weight: 400;
  font-style: initial;
  line-height: 1em;
}

h2 i::before {
  content: 'Oxygen';
  position: absolute;
  text-align: center;
  width: 100%;
  display: initial;
  transition: .5s;
}

h2:hover i::before {
  opacity: 0;
  letter-spacing: 2em;
}

h2 i::after {
  content: 'Helping India Breathe Again';
  opacity: 0;
  visibility: hidden;
  transition: .5s;
}

h2:hover i::after {
  opacity: 1;
  visibility: visible;
}